Dev server error is present when template error is fixed #39147
Description
The issue is caused by package @angular/....
"@angular/animations": "~10.1.4",
"@angular/common": "~10.1.4",
"@angular/compiler": "~10.1.4",
"@angular/core": "~10.1.4",
"@angular/forms": "~10.1.4",
"@angular/platform-browser": "~10.1.4",
"@angular/platform-browser-dynamic": "~10.1.4",
"@angular/router": "~10.1.4",
"rxjs": "~6.6.0",
"tslib": "^2.0.0",
"zone.js": "~0.10.2"
Description
Dev server error is present when template error is fixed
🔬 Minimal Reproduction
install the latest version of @angular/cli
I am using
"@angular/cli": "~10.1.4",
create a brand new app like
ng new my-new-app
In app.component.html, copy and paste the following line inside of the main content div:
<h1 [style.color]="'red'">Hello World!</h1>
Change the first double quote to single quote to cause the template error. Then change it back to double quote to fix it.
In the terminal, these errors are shown:
ERROR in src/app/app.module.ts:9:5 - error NG6001: The class 'AppComponent' is listed in the declarations of the NgModule 'AppModule', but is not a directive, a component, or a pipe. Either remove it from the NgModule's declarations, or add an appropriate Angular decorator.
9 AppComponent
~~~~~~~~~~~~
src/app/app.component.ts:8:14
8 export class AppComponent {
~~~~~~~~~~~~
'AppComponent' is declared here.
src/app/app.component.html:417:25 - error NG8002: Can't bind to 'ngSwitch' since it isn't a known property of 'div'.
417 <div class="terminal" [ngSwitch]="selection.value">
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/app/app.component.ts:5:16
5 templateUrl: './app.component.html',
~~~~~~~~~~~~~~~~~~~~~~
Error occurs in the template of component AppComponent.
src/app/app.component.html:535:1 - error NG8001: 'router-outlet' is not a known element:
1. If 'router-outlet' is an Angular component, then verify that it is part of this module.
2. If 'router-outlet' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas' of this component to suppress this message.
535 <router-outlet></router-outlet>
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/app/app.component.ts:5:16
5 templateUrl: './app.component.html',
~~~~~~~~~~~~~~~~~~~~~~
Error occurs in the template of component AppComponent.
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🌍 Your Environment
It's a brand new angular app as of 10/6/2020:
"dependencies": {
"@angular/animations": "~10.1.4",
"@angular/common": "~10.1.4",
"@angular/compiler": "~10.1.4",
"@angular/core": "~10.1.4",
"@angular/forms": "~10.1.4",
"@angular/platform-browser": "~10.1.4",
"@angular/platform-browser-dynamic": "~10.1.4",
"@angular/router": "~10.1.4",
"rxjs": "~6.6.0",
"tslib": "^2.0.0",
"zone.js": "~0.10.2"
},
"devDependencies": {
"@angular-devkit/build-angular": "~0.1001.4",
"@angular/cli": "~10.1.4",
"@angular/compiler-cli": "~10.1.4",
"@types/node": "^12.11.1",
"@types/jasmine": "~3.5.0",
"@types/jasminewd2": "~2.0.3",
"codelyzer": "^6.0.0",
"jasmine-core": "~3.6.0",
"jasmine-spec-reporter": "~5.0.0",
"karma": "~5.0.0",
"karma-chrome-launcher": "~3.1.0",
"karma-coverage-istanbul-reporter": "~3.0.2",
"karma-jasmine": "~4.0.0",
"karma-jasmine-html-reporter": "^1.5.0",
"protractor": "~7.0.0",
"ts-node": "~8.3.0",
"tslint": "~6.1.0",
"typescript": "~4.0.2"
}